Yes that's correct. However the 813 was scrapped in 1990 according to my knowledge. But I have to check that again.
Here ia a link to a site where the number is still seen in ... the Musee Des Avions de Chasse, Savigny-Les-Beaune, Beaune, Bourgogne Aerial Visuals - Airframe Photo Viewer
There was also a plane 6013 and exibited in a museum in Warsaw. She wore the red no. "13" while servicing.
Not a purchase but kinda looking for purchases but I had to post this here. The Roden 1/32 Birddog on this day is going for 47-91$ plus shipping. As I was scrolling down I noticed a guy wasn't selling the kit but he is selling off the sprues individually and if successful, he makes $148.85.